From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 754D8C19F2B for ; Mon, 1 Aug 2022 19:04:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234297AbiHATD7 (ORCPT ); Mon, 1 Aug 2022 15:03:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234283AbiHATDY (ORCPT ); Mon, 1 Aug 2022 15:03:24 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AFFC39B8F; Mon, 1 Aug 2022 12:02:55 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 37B4FB81647; Mon, 1 Aug 2022 19:02:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54541C433D7; Mon, 1 Aug 2022 19:02:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659380573; bh=PYfW4qUNcV0ql8wYHgPWd/Nrk4am9nAFnFvDd23OFxw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ejLVUnnOKEVC5jPibvjUHB63sON3CuE7lbJmdDYnPoBdiK2M6oloRHOk/ZtSDN4Y2 0jRQ+m6B4FodsXresVGajUQCI7dgUZUMsdasbn+bIf5EQMejjF0MxWu5cU3107KIgs io4FvlxyZEe0WeHTuyXtF0Wt2FMYCkOwTB4BpM17pu9eI8biVMomMGQ87tD8Y/Wvp+ 5hRcTbzGU0BFXkwwtOzqnbfKdFRoKd2CEwZZdNKvk+KVHEgZk+DrK9Fjumvhw2cRw0 ZBiagHduiVTq/+m8JWNO8TZdUOIvJoxLV/KmuI4pGK+pPZnGRFwSbvgSrjzfnfckvO IweUieLEstMSQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Biju Das , Geert Uytterhoeven , Mark Brown , Sasha Levin , linux-spi@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 4/8] spi: spi-rspi: Fix PIO fallback on RZ platforms Date: Mon, 1 Aug 2022 15:02:39 -0400 Message-Id: <20220801190243.3818811-4-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220801190243.3818811-1-sashal@kernel.org> References: <20220801190243.3818811-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Biju Das [ Upstream commit b620aa3a7be346f04ae7789b165937615c6ee8d3 ] RSPI IP on RZ/{A, G2L} SoC's has the same signal for both interrupt and DMA transfer request. Setting DMARS register for DMA transfer makes the signal to work as a DMA transfer request signal and subsequent interrupt requests to the interrupt controller are masked. PIO fallback does not work as interrupt signal is disabled. This patch fixes this issue by re-enabling the interrupts by calling dmaengine_synchronize(). Signed-off-by: Biju Das Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220721143449.879257-1-biju.das.jz@bp.renesas.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-rspi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index d575c935e9f0..f634a405382c 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -612,6 +612,10 @@ static int rspi_dma_transfer(struct rspi_data *rspi, struct sg_table *tx, rspi->dma_callbacked, HZ); if (ret > 0 && rspi->dma_callbacked) { ret = 0; + if (tx) + dmaengine_synchronize(rspi->ctlr->dma_tx); + if (rx) + dmaengine_synchronize(rspi->ctlr->dma_rx); } else { if (!ret) { dev_err(&rspi->ctlr->dev, "DMA timeout\n"); -- 2.35.1